package com.itheima.mapper;

import com.itheima.pojo.Dept;
import org.apache.ibatis.annotations.*;

import java.util.List;

@Mapper
public interface DeptMapper {

    //方式一： @Results
    /*@Results({
            @Result(column = "create_time", property = "createTime"),
            @Result(column = "update_time", property = "updateTime")
    })*/
    @Select("select * from dept")
    //方式二： sql字段起别名
    //@Select("select id, name, create_time createTime, update_time updateTime from dept")
    List<Dept> findAll();

    Integer deleteById(Integer id);

    @Insert("insert into dept(name, create_time, update_time) values (#{name},#{createTime},#{updateTime})")
    Integer add(Dept dept);

    @Select("select * from dept where id = #{id}")
    Dept selectById(Integer id);

    @Update("update dept set name = #{name},update_time = #{updateTime} where id = #{id} ")
    Integer updateById(Dept dept);
}
